Flashing Optimus F3 - General Questions and Answers

I am using an unlocked Metropcs phone on AT&T but when they sent out an update it removed my ability to connect to 4g. Im now stuck with only 2g. After trying everything, they now suggest that I flash my phone to remove the update and reconnect to 4g. Does this option make sense and if so any suggestions on what firmware to use? Btw, I a total noob.

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No 3G on Optimus T after rooting & custom rom

Hi,
I have an LG Optimus T with T-Mobile (G509), and network data (3G/E) used to work just fine. I've unlocked the phone, rooted it using z4root, then flashed the DarkMoon rom (2.2.1, G500, based on V10c). Since that point I've lost the 3G or even Edge network data. I can only connect to the internet via Wifi. I can't even get GPS location on Maps if the Wifi is off.
Any clues? (I'm still new to Android).
Thanks a million in advance!
As I told u in a private email., I will send u a file to fix this problem, and in my next rom upgrade things will be fixed
Will this ROM work on the Optimus for Sprint??
the same thing happened to me. Can i have the file to fix this to?
I also am having the same issue with my phone. After rooting it worked fine for a couple of weeks but now I am unable to use 3G. I am only able to use data when connecting using wifi. Can you send me the file as well? I would really appreciate it. Here are my phone specs below:
LG Optimus V
Android Version 2.2.1
Baseband Version VM670ZV4_60401001
Software Version VM670ZV4
Hardware Version 1.2

[Q] AtT NOte 2 unlocked, now using Tmobile, Can't upgrade firmware

MY sister called ATt to unlock her phone when she went abroad, they did. Now she no longer has ATT and is with tmobile. Using the Tmobile sim card, she can't seem to upgrade her OS using the firmware update option in settings. How can she go about upgrading? she currently has android 4.1.2 with the NOte 2?
also if i flash aokp on her phone, but she don't like it, then flash back the original 4.1.2 firmware, would i lose the unlock that ATT did for her and she can't use Tmobile anymore?
jinjin12 said:
MY sister called ATt to unlock her phone when she went abroad, they did. Now she no longer has ATT and is with tmobile. Using the Tmobile sim card, she can't seem to upgrade her OS using the firmware update option in settings. How can she go about upgrading? she currently has android 4.1.2 with the NOte 2?
also if i flash aokp on her phone, but she don't like it, then flash back the original 4.1.2 firmware, would i lose the unlock that ATT did for her and she can't use Tmobile anymore?
Click to expand...
Click to collapse
Carrier unlocking is separate from ROM. If you can install custom recovery (CWM, TWRP), switching from ROM to ROM is as simple as doing a backup of one, wiping the device, and installing another ROM. Always save a back-up to your computer, and it's also a good idea (much easier in the end) to do a batch back-up through Titanium of all the user apps, so you can simply restore them to the new ROM instead of downloading them all over again and losing the app data.
Factory firmware can be obtained from sammmobile.com and are flashable with Odin (google it).
thanks for the help but why can't she update the stock rom from the settings though when she switched to tmobile? are the update locked to the att carrier?
thanks for the help but why can't she update the stock rom from the settings though when she switched to tmobile? are the update locked to the att carrier?
I wouldn't worry about it too much. The method Planterz gave you will give her the latest firmware. There's at least a few Lolipop ROMs for the Note 2
TechShui said:
I wouldn't worry about it too much. The method Planterz gave you will give her the latest firmware. There's at least a few Lolipop ROMs for the Note 2
Click to expand...
Click to collapse
Idk the site only has up to stock firmware 4.1.2...which is what she already has on her phone, but on the samsung site, it says they currently have android 4.4.2 for the SGH-I317 phone. i don't know how to get that

Verizon M8 unlocked w/ TMO sim, same flash process?

Hello, just upgraded from a Galaxy S4 on T-Mobile to an unlocked Verizon HTC One M8 handset. Popped in the sim, I can send and receive text, data on HSPA/3G mode but not one LTE or Global mode (anyone know why this is? I'd like to be able to use t-mobiles LTE and not just HSPA/3G), get the usual "sim unknown source" stuff. I am wanting to flash Skydragon.
My question, is there anything special I need to do before/after I flash these, since I'm using a different network than what the handset was originally supposed to be on? Maybe I need to flash different radio? This is my first time using an unlocked phone, previously all my phones with custom ROMs were on the same network as the handset variant.
Otherwise, would I just update to the latest 5.0.1 OTA update from Verizon, root/unlock bootloader, install TWRP, then flash Skydragon, and I'm all good?
Edit: Well, further reading seems to indicate to me that it turns out verizon M8 devices already updated to 5.0.x are still not able to be rooted at this time?
Thanks for the help

SM-G920A from AT&T to to T-Mobile - 4G LTE Signal Booster

Hi,
I recently brought over my SM-G920A from ATT to T-mobile. I cannot get the ATT phone to recognize the existence of the Signal Booster--which works great on T-Moble phones--so I cannot connect to it. I have been a few rounds with others here that have walked me through the attempt to flash this phone with T-Mobile baseband load and it simply will not work. The phone is unlocked and is using the following load:
baseband G920AUCS7ERC1
BUILD NRD90M G920AUCS7ERC1
I have dev mode unlocked and have no idea what to set those settings at or what they were originally, I attempted to flash SM-GO-G920T onto it but it will not take because there is no current bootloader that can overwrite the ATT version.
So, I'm about to go back and flash the old software back on here.
But, I would really like to see if anyone has any ideas that can help me either get this phone to recognize the T-Mobile 4G-LTE signal booster or help me figure out how to get this phone to accept the SM-G920A load all together.
I would like to thank everyone in advance for your time. Please help.
Thanks and have a great day!

T-mobile G7 Power on Verizon MVNO

Hello,
I recently got a G7 power T-mobile variant and was trying to get it working on safelink wireless a Verizon mvno. I have it network unlocked and bootloader unlocked and have been able to flash custom roms and my sim is detected but I can't seem to get any calls texting or data on it. I've been perusing the forum here reading everything I can on the issue and feel like I'm 90% of the way there but missing something. For anyone that has gotten Verizon working on their T-mobile G7 please help with how you managed to do it.
I flashed RR and then the Verizon modem but that didn't work. I'm going to try flashing back to stock T-mobile to see if I can get some connectivity.
Anyone have any suggestions?
Thanks
I have already flashed a custom rom to my phone that hasn't had connectivity and the issue is that the custom rom you flashed to your phone doesn't have your regional code for ur area and the tz.mbn file needs to be updated with your area's cod or just re-flash another custom rom because it's rare on how many times I have had to erase completely re-installed new and different Operating Systems to my phone just to learn and try different Roms and only twice have I got a Rom that doesn't support my data.
So just try a different rom from RR and it should be able to work? Should I do a comletely clean install like, wipe system then flash or flash stock rom, then do custom rom over the top?

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